The right side of the Houston Texans' offensive line was a major liability last season and remained a problem area entering training camp. Now the team has a concern on the left side of the line.

Left guard Wade Smith, a 47-game starter over the past three seasons, will be out "an undetermined amount of time" after undergoing arthroscopic knee surgery, John McClain of the Houston Chronicle reported Tuesday.

Between his own calf injury and the uncertainty up front, don't be surprised if Arian Foster gets off to a slow start this season. It might be October or November before the ground attack clicks on all cylinders.